sheishuoAPP/app/res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/skin_global_bg">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay"
        app:elevation="0dp">

        <com.sheishuo.app.common.views.BaseToolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:titleTextAppearance="@style/Toolbar.TitleText"
            android:visibility="visible"/>
    </android.support.design.widget.AppBarLayout>

    <com.sheishuo.app.common.ui.viewpager.PagerSlidingTabStrip
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="@dimen/pager_sliding_tab_strip_height"
        android:layout_below="@id/app_bar_layout"
        android:background="@drawable/skin_global_bg"
        android:visibility="gone"/>


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_below="@id/tabs">

        <android.support.v4.view.ViewPager
            android:id="@+id/main_tab_pager"
            android:layout_width="match_parent"
            android:layout_weight="9"
            android:layout_height="0dp"
            android:layout_below="@id/tabs"/>


        <android.support.design.widget.BottomNavigationView
            android:id="@+id/main_navigationbar"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            app:menu="@menu/main_botton_navi_menu" />


    </LinearLayout>
    <com.netease.nim.uikit.common.ui.drop.DropCover
        android:id="@+id/unread_cover"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="invisible" />

</RelativeLayout>